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A030224 Triangular polyominoes (n-iamonds) without bilateral symmetry (holes are allowed). 5
0, 0, 0, 1, 2, 7, 19, 54, 147, 418, 1150, 3254, 9138, 25953, 73717, 210719, 603370, 1734739, 4998542, 14444576, 41829991, 121406927, 353029078, 1028417980, 3000754648, 8769118355, 25661830891, 75194886765 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..28.

CROSSREFS

Cf. A000577, A006534, A030223, A030224.

Sequence in context: A073799 A040016 A145519 * A114624 A091024 A275289

Adjacent sequences:  A030221 A030222 A030223 * A030225 A030226 A030227

KEYWORD

nonn

AUTHOR

David W. Wilson

EXTENSIONS

More terms from Joseph Myers, Sep 24 2002

STATUS

approved

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Last modified January 18 04:47 EST 2019. Contains 319269 sequences. (Running on oeis4.)